<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <div>{{title}}</div>
        <h3>{{user.name}}</h3>
        <h3>{{fn()}}</h3>
    </div>
    <script src="./lib/vue.js"></script>
    <script>
        let vm = new Vue({
            el:"#app",
            data:{
                age:18,
                title:'hello',
                user:{name:'张三'}
            },
            methods: {
                fn(){
                    setTimeout(()=>{
                        this.title = 'abc'
                    },2000)
                }
            },
        })
    </script>
</body>
</html>